如果未单击任何链接，则显示所有div

Question

我有一个页面名称url.com/yourfirstpage/，当我转到该页面时，默认情况下所有div都隐藏（显示：无） 如果我们将＃sec1定位为url.com/yourfirstpage/#sec1，则仅显示sec1并隐藏其他内容。 我想知道我们是否要在没有url.com/yourfirstpage/之类的锚ID的情况下进入url，它需要显示所有div。

#sec1, #sec2, #sec3{
	display:none;
}
#sec1:target{
	display:block;
}
#sec2:target{
	display:block;
}
#sec3:target{
	display:block;
}

<a href="#sec1">sec1</a>
<a href="#sec2">sec2</a>
<a href="#sec3">sec3</a>

<div id="sec1" class="page"> this is sec1</div>
<div id="sec2" class="page"> this is sec2</div>
<div id="sec3" class="page"> this is sec3</div>

Answer 1

如果您能够修改HTML结构，这是一个技巧。想法是使元素可见，然后我们使用:target隐藏它们。由于我们之前没有兄弟选择器或父选择器，因此我在父元素中使用了id来选择任何元素：

#sec1:target .page:nth-child(n+2){
  display: none;
}

#sec2:target .page:nth-child(2n+1){
  display: none;
}

#sec3:target .page:nth-last-child(n+2){
  display: none;
}

<a href="#sec1">sec1</a>
<a href="#sec2">sec2</a>
<a href="#sec3">sec3</a>

<div id="sec1">
  <div id="sec2">
    <div id="sec3">
      <div class="page"> this is sec1</div>
      <div class="page"> this is sec2</div>
      <div class="page"> this is sec3</div>
    </div>
  </div>
</div>

它可以处理任意数量的部分，我们可以如下改进CSS代码：

#sec1:target .page:not(:nth-child(1)),
#sec2:target .page:not(:nth-child(2)),
#sec3:target .page:not(:nth-child(3)),
#sec4:target .page:not(:nth-child(4)),
#sec5:target .page:not(:nth-child(5)) {
  display: none;
}

<a href="#sec1">sec1</a>
<a href="#sec2">sec2</a>
<a href="#sec3">sec3</a>
<a href="#sec4">sec4</a>
<a href="#sec5">sec5</a>

<div id="sec1">
  <div id="sec2">
    <div id="sec3">
      <div id="sec4">
        <div id="sec5">
          <div class="page"> this is sec1</div>
          <div class="page"> this is sec2</div>
          <div class="page"> this is sec3</div>
          <div class="page"> this is sec4</div>
          <div class="page"> this is sec5</div>
        </div>
      </div>
    </div>
  </div>
</div>

Answer 2

这种快速方法可能会有所帮助

您可以使用postcss插件在CSS中使用!选择器

[...document.querySelectorAll('a')].forEach(a => {
    a.addEventListener('click', () => {
        a.parentElement.classList.add('targeted')
    })
})

.targeted div {
  display: none;
}
.targeted div:target {
  display: block;
}

<a href="#sec1">sec1</a>
<a href="#sec2">sec2</a>
<a href="#sec3">sec3</a>

<div id="sec1" class="page"> this is sec1</div>
<div id="sec2" class="page"> this is sec2</div>
<div id="sec3" class="page"> this is sec3</div>